Connecting rod structure, footboard device, and vehicle

Abstract

Disclosed are a connecting rod structure, a footboard device, and a vehicle including same. A first connecting rod includes a first end pivotally connected with a second seat through a first pivot shaft, and a second end hinged with a first end of a second connecting rod; a spring includes a first end pivotally connected with the second seat through a second pivot shaft, and a second end pivotally connected with the first connecting rod or the second connecting rod through a third pivot shaft; a distance between an axis of the first pivot shaft and an axis of the third pivot shaft is a first distance, and a distance between the axis of the first pivot shaft and an axis of the second pivot shaft is a second distance; and a sum of the first distance and a free length of the spring is greater than the second distance.

The invention claimed is: 
     
       1. A connecting rod structure, comprising: a mounting plate, a spring, a first connecting rod, a first seat provided on the mounting plate, a rotating sleeve pivotally connected with the first seat and provided with a sliding channel, a second connecting rod slidably provided in the sliding channel, and a second seat provided on the mounting plate, wherein the first connecting rod comprises a first end pivotally connected with the second seat through a first pivot shaft, and a second end hinged with a first end of the second connecting rod; the spring comprises a first end pivotally connected with the second seat through a second pivot shaft, and a second end pivotally connected with the first connecting rod through a third pivot shaft; the first pivot shaft, the second pivot shaft, and the third pivot shaft are parallel to each other; a distance between an axis of the first pivot shaft and an axis of the third pivot shaft is a first distance, and a distance between the axis of the first pivot shaft and an axis of the second pivot shaft is a second distance; and a sum of the first distance and a free length of the spring is greater than the second distance. 
     
     
       2. The connecting rod structure according to  claim 1 , wherein the mounting plate is flat; both the first seat and the second seat are connected with a bottom wall of the mounting plate; and the first connecting rod is hinged with the second seat. 
     
     
       3. The connecting rod structure according to  claim 2 , wherein the second seat comprises: a first plate provided on the mounting plate and a second plate provided on the mounting plate; both the first plate and the second plate are perpendicular to the first pivot shaft; the first pivot shaft comprises one end provided on the first plate, and the other end provided on the second plate; and the first connecting rod is connected with the first pivot shaft between the first plate and the second plate. 
     
     
       4. The connecting rod structure according to  claim 3 , wherein the connecting rod structure comprises two springs. 
     
     
       5. The connecting rod structure according to  claim 1 , further comprising: a first stop block and a second stop block, wherein the axis of the first pivot shaft is located between the first stop block and the second stop block; both the first stop block and the second stop block are located on a plane where the first connecting rod rotates; the first stop block comprises a first stop surface; the first stop surface abuts against the first connecting rod; the second stop block comprises a second stop surface; and the second stop surface abuts against the second connecting rod. 
     
     
       6. The connecting rod structure according to  claim 5 , wherein when the first stop surface abuts against the first connecting rod, or when the second stop surface abuts against the second connecting rod, the spring is compressed. 
     
     
       7. A footboard device, comprising: a footboard, and the connecting rod structure according to  claim 1 , wherein the footboard is fixedly connected with a second end of the second connecting rod. 
     
     
       8. A footboard device, comprising: a footboard, and the connecting rod structure according to  claim 2 , wherein the footboard is fixedly connected with a second end of the second connecting rod. 
     
     
       9. A footboard device, comprising: a footboard, and the connecting rod structure according to  claim 3 , wherein the footboard is fixedly connected with a second end of the second connecting rod. 
     
     
       10. A footboard device, comprising: a footboard, and the connecting rod structure according to  claim 4 , wherein the footboard is fixedly connected with a second end of the second connecting rod. 
     
     
       11. A footboard device, comprising: a footboard, and the connecting rod structure according to  claim 5 , wherein the footboard is fixedly connected with a second end of the second connecting rod. 
     
     
       12. A footboard device, comprising: a footboard, and the connecting rod structure according to  claim 6 , wherein the footboard is fixedly connected with a second end of the second connecting rod. 
     
     
       13. A vehicle, comprising: a vehicle body, and the footboard device according to  claim 7 , wherein the mounting plate is provided on a chassis of the vehicle body; and the first connecting rod, the first seat, and the second seat are located under the chassis. 
     
     
       14. A vehicle, comprising: a vehicle body, and the footboard device according to  claim 8 , wherein the mounting plate is provided on a chassis of the vehicle body; and the first connecting rod, the first seat, and the second seat are located under the chassis. 
     
     
       15. A vehicle, comprising: a vehicle body, and the footboard device according to  claim 9 , wherein the mounting plate is provided on a chassis of the vehicle body; and the first connecting rod, the first seat, and the second seat are located under the chassis. 
     
     
       16. A vehicle, comprising: a vehicle body, and the footboard device according to  claim 10 , wherein the mounting plate is provided on a chassis of the vehicle body; and the first connecting rod, the first seat, and the second seat are located under the chassis. 
     
     
       17. A vehicle, comprising: a vehicle body, and the footboard device according to  claim 11 , wherein the mounting plate is provided on a chassis of the vehicle body; and the first connecting rod, the first seat, and the second seat are located under the chassis. 
     
     
       18. A vehicle, comprising: a vehicle body, and the footboard device according to  claim 12 , wherein the mounting plate is provided on a chassis of the vehicle body; and the first connecting rod, the first seat, and the second seat are located under the chassis.